Memory leaks when application is compiled with BOOST_DISABLE_THREADS

Bắt đầu bằng cách biên dịch test.cc được cung cấp cả khi có và khi không có BOOST_DISABLE_THREADS, sử dụng lệnh AddressSanitizer được nêu, rồi so sánh các báo cáo rò rỉ. Truy vết các cấp phát được báo cáo thông qua program_options::options_description_easy_init và bool_switch; hoàn thành khi giải thích được liệu macro có gây ra rò rỉ hay không và sửa được nó mà không tạo thêm rò rỉ trong cả hai bản build.

There's a memory leak if an application is compiled with BOOST_DISABLE_THREADS, is this expected behaviour?

test.cc:

#include <boost/program_options.hpp>

int main(int argc, char *argv[]) {
        boost::program_options::options_description opts{"Test"};
        opts.add_options()
                ("help,h", boost::program_options::bool_switch(), "display this help and exit");

        return 0;
}

Without BOOST_DISABLE_THREADS defined:

$ g++ -fsanitize=address  test.cc  -lboost_program_options -lboost_system -o test
$ ./test
$

With BOOST_DISABLE_THREADS defined:

$ g++ -fsanitize=address -DBOOST_DISABLE_THREADS  test.cc  -lboost_program_options -lboost_system -o test
=================================================================
==97000==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 24 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f675771777f in boost::program_options::options_description_easy_init::operator()(char const*, boost::program_options::value_semantic const*, char const*) (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x3f77f)

Indirect leak of 176 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f6757732624 in boost::program_options::bool_switch(bool*) (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x5a624)

Indirect leak of 120 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f6757717761 in boost::program_options::options_description_easy_init::operator()(char const*, boost::program_options::value_semantic const*, char const*) (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x3f761)
    #2 0x7f6756d67b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 27 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f67577155fc  (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x3d5fc)

Indirect leak of 24 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f6757716593 in boost::program_options::option_description::option_description(char const*, boost::program_options::value_semantic const*, char const*) (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x3e593)

Indirect leak of 16 byte(s) in 1 object(s) allocated from:
    #0 0x7f6757a39458 in operator new(unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe0458)
    #1 0x7f67577326c5 in boost::program_options::bool_switch(bool*) (/usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.65.1+0x5a6c5)

SUMMARY: AddressSanitizer: 387 byte(s) leaked in 6 allocation(s).